Contacts of the helix formed by residues 469 - 495 (chain C) in PDB entry 3RMD


Residue contacts within the protein are derived with the CSU software (Sobolev V., Sorokine A., Prilusky J., Abola E.E. and Edelman M. (1999) Automated analysis of interatomic contacts in proteins. Bioinformatics, 15, 327-332). A short description of the analytical approach is given at the end of the page.
For CSU analysis of other PDB entry

Note:
Non-standard 3 letter residue codes indicate a heterogroup. To identify and analyse, use LPC software

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with GLY 469 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    424C  ASN*     3.0    17.4    +      -       -      -
    426C  SER*     3.9     6.1    -      -       -      -
    428C  GLU*     3.6     6.7    -      -       -      -
    429C  THR*     3.5    22.4    -      -       -      +
    468C  ASP*     1.3    74.1    -      -       -      +
    470C  VAL*     1.3    59.7    +      -       -      -
    472C  PRO*     3.5    10.1    -      -       -      +
    473C  THR*     2.8    27.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 470 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52C  ILE*     3.8    26.2    -      -       +      +
    369C  ILE*     4.0    23.3    -      -       +      -
    373C  LEU*     4.0    27.1    -      -       +      -
    378C  LYS*     5.8     3.4    -      -       -      +
    426C  SER*     3.3     6.5    +      -       -      +
    428C  GLU*     3.6    20.9    -      -       -      +
    469C  GLY*     1.3    70.3    -      -       -      +
    471C  VAL*     1.3    64.9    +      -       +      +
    473C  THR*     2.8    23.5    +      -       -      -
    474C  GLU*     3.2    19.1    +      -       -      +
    577C  TYR*     5.0     6.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 471 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    369C  ILE*     5.2     9.6    -      -       +      -
    420C  ILE*     3.9    18.6    -      -       +      -
    425C  ILE      3.9     5.2    -      -       -      +
    426C  SER*     3.4    13.2    -      -       -      +
    427C  PRO*     4.1    13.5    -      -       +      -
    470C  VAL*     1.3    79.9    -      -       +      +
    472C  PRO*     1.3    69.9    -      -       +      +
    473C  THR      3.0     1.0    +      -       -      -
    474C  GLU*     3.5     4.2    +      -       -      +
    475C  ILE*     3.1    23.7    +      -       -      +
    566C  LEU*     4.1    21.9    -      -       +      +
    570C  LEU*     4.3    26.9    -      -       +      -
    577C  TYR*     4.7    11.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with PRO 472 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    420C  ILE*     3.7    24.2    -      -       +      +
    421C  ARG*     3.9    10.3    -      -       +      +
    424C  ASN*     3.8    23.6    -      -       -      +
    425C  ILE      3.5    20.0    -      -       -      +
    426C  SER*     3.7     2.5    -      -       -      +
    468C  ASP*     5.4     3.6    -      -       +      -
    469C  GLY      3.5    17.9    -      -       -      +
    471C  VAL*     1.3    94.9    -      -       +      +
    473C  THR*     1.3    56.1    +      -       -      +
    475C  ILE*     2.9    14.4    -      -       +      +
    476C  THR*     2.8    26.2    +      -       -      -
    677C  LYS*     6.1     1.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with THR 473 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    376C  GLN*     6.3     0.9    -      -       -      +
    468C  ASP*     3.3    22.1    +      -       -      +
    469C  GLY      2.8    16.1    +      -       -      -
    470C  VAL*     2.8    11.3    +      -       -      -
    472C  PRO*     1.3    75.8    -      -       -      +
    474C  GLU*     1.3    72.0    +      -       -      +
    475C  ILE      3.1     1.1    -      -       -      -
    476C  THR*     3.0     6.1    +      -       -      -
    477C  LYS*     2.8    31.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 474 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    365C  TRP*     4.2    13.5    -      -       +      -
    368C  ILE*     4.5    10.1    -      -       +      +
    369C  ILE*     4.3    22.5    -      -       +      +
    372C  SER*     2.7    26.1    +      -       -      +
    373C  LEU*     5.2     1.0    -      -       -      +
    376C  GLN*     5.1     3.6    +      -       -      -
    470C  VAL*     3.2    25.4    +      -       -      +
    471C  VAL*     4.2     6.3    -      -       -      +
    473C  THR*     1.3    88.5    -      -       -      +
    475C  ILE*     1.3    63.5    +      -       -      +
    477C  LYS*     2.6    40.8    +      -       -      +
    478C  VAL*     3.1    29.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 475 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    365C  TRP*     4.8     6.2    -      -       +      -
    417C  PRO*     4.0    31.6    -      -       +      +
    420C  ILE*     4.6     4.3    -      -       +      -
    421C  ARG*     3.6    17.9    -      -       +      -
    471C  VAL      3.1    16.1    +      -       -      +
    472C  PRO*     2.9    26.5    -      -       +      +
    474C  GLU*     1.3    76.5    -      -       -      +
    476C  THR*     1.3    68.7    +      -       -      +
    478C  VAL*     3.0     9.7    +      -       +      +
    479C  PHE*     3.0    27.6    +      -       +      +
    563C  ILE*     4.1    28.3    -      -       +      +
    566C  LEU*     3.5    31.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 476 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    421C  ARG*     2.8    42.0    +      -       -      +
    472C  PRO      2.8    21.5    +      -       -      -
    473C  THR*     3.0     6.1    +      -       -      -
    475C  ILE*     1.3    82.2    -      -       -      +
    477C  LYS*     1.3    62.8    +      -       -      +
    479C  PHE*     3.3     7.7    +      -       -      +
    480C  ASN*     2.7    44.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 477 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    350C  TYR*     5.2     2.9    -      -       -      -
    368C  ILE*     5.2     6.3    +      -       -      +
    372C  SER*     3.1    20.6    +      -       -      +
    473C  THR*     2.8    14.4    +      -       +      +
    474C  GLU*     2.6    42.3    +      -       -      +
    476C  THR*     1.3    78.7    -      -       -      +
    478C  VAL*     1.3    57.6    +      -       -      +
    480C  ASN*     3.2     9.4    +      -       -      +
    481C  GLN*     2.9    54.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 478 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    350C  TYR*     4.0    17.7    -      -       +      +
    365C  TRP*     3.8    24.0    -      -       +      -
    368C  ILE*     5.4     2.9    -      -       +      -
    474C  GLU      3.2    14.4    -      -       -      +
    475C  ILE*     3.0     6.9    +      -       +      +
    477C  LYS*     1.3    78.1    -      -       +      +
    479C  PHE*     1.3    60.3    +      -       -      +
    481C  GLN*     3.6     9.5    +      -       -      +
    482C  ARG*     3.4    20.8    +      -       -      +
    559C  ARG*     3.6    42.5    -      -       -      +
    562C  LEU*     4.2    11.4    -      -       +      -
    563C  ILE*     3.9    10.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 479 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    413C  THR*     5.0     9.0    -      -       +      -
    414C  SER*     3.3    33.2    -      -       -      -
    417C  PRO*     4.5     6.7    -      -       +      -
    418C  SER*     5.0     5.6    -      -       -      -
    421C  ARG*     3.7    24.5    -      -       -      +
    475C  ILE*     3.0    18.8    +      -       +      +
    476C  THR*     3.4    14.6    -      -       +      +
    477C  LYS      3.1     0.4    -      -       -      -
    478C  VAL*     1.3    79.2    -      -       -      +
    480C  ASN*     1.3    61.2    +      -       -      +
    482C  ARG*     3.8     6.2    -      -       -      +
    483C  LYS*     3.2    32.7    +      -       +      +
    563C  ILE*     3.4    41.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 480 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    476C  THR*     2.7    37.3    +      -       -      +
    477C  LYS*     3.7     8.3    -      -       -      +
    479C  PHE*     1.3    77.8    -      -       -      +
    481C  GLN*     1.3    56.4    +      -       +      +
    482C  ARG      3.1     0.7    -      -       -      -
    483C  LYS*     3.3    12.0    +      -       -      +
    484C  GLU*     2.7    39.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 481 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    350C  TYR*     2.4    35.7    +      -       -      -
    477C  LYS*     2.9    49.6    -      -       +      +
    478C  VAL*     3.7     8.3    -      -       -      +
    480C  ASN*     1.3    74.7    -      -       +      +
    482C  ARG*     1.3    55.8    +      -       -      +
    484C  GLU*     3.1    11.8    -      -       -      +
    485C  HIS*     2.7    46.0    +      -       +      +
    559C  ARG*     2.7    39.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 482 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    478C  VAL      3.4    11.0    +      -       -      +
    479C  PHE*     3.8    12.3    -      -       -      +
    481C  GLN*     1.3    76.4    -      -       -      +
    483C  LYS*     1.3    69.1    +      -       -      +
    484C  GLU      2.6     2.4    +      -       -      -
    485C  HIS*     2.9     2.6    +      -       -      +
    486C  LYS*     2.9    46.6    +      -       -      +
    556C  GLN*     2.8    57.1    +      -       +      +
    559C  ARG*     3.8    13.2    -      -       +      +
    560C  LYS*     3.0    40.9    -      -       -      +
    563C  ILE*     4.3    16.8    -      -       -      -
      2J  DTP      5.5     3.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 483 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    479C  PHE*     3.2    23.3    -      -       +      +
    480C  ASN*     3.3    16.2    -      -       -      +
    482C  ARG*     1.3    79.8    -      -       +      +
    484C  GLU*     1.3    64.5    +      -       -      +
    486C  LYS*     3.7    20.2    +      -       -      +
    487C  GLY*     3.5    11.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 484 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    480C  ASN*     2.7    16.9    +      -       -      +
    481C  GLN*     3.1    16.4    -      -       -      +
    482C  ARG      2.6     3.4    +      -       -      -
    483C  LYS*     1.3    70.2    -      -       -      +
    485C  HIS*     1.3    70.5    +      -       -      +
    486C  LYS      2.6    16.0    +      -       -      -
    487C  GLY*     2.7    17.0    +      -       -      -
    488C  TYR*     3.0    44.8    +      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 485 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    102C  LYS*     6.2     0.4    +      -       -      -
    481C  GLN*     2.7    33.8    +      -       +      +
    482C  ARG      4.1     1.6    -      -       -      +
    484C  GLU*     1.3    89.0    -      -       -      +
    486C  LYS*     1.3    56.5    +      -       -      +
    488C  TYR*     3.3    29.0    -      +       +      +
    489C  MET*     3.1    24.6    +      -       -      +
    551C  ALA      5.1     1.8    -      -       -      -
    552C  GLY*     3.9    18.2    -      -       -      +
    555C  ALA*     3.2    28.9    -      -       +      +
    556C  GLN*     4.3     8.5    -      -       -      +
    559C  ARG*     3.2    26.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 486 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    482C  ARG*     2.9    47.4    +      -       -      +
    483C  LYS*     3.7    20.4    -      -       -      +
    484C  GLU      2.6     6.3    +      -       -      -
    485C  HIS*     1.3    71.0    -      -       -      +
    487C  GLY*     1.3    52.7    +      -       -      +
    489C  MET*     2.8    20.5    +      -       +      +
    490C  LEU*     2.5    37.4    +      -       -      +
    556C  GLN*     3.2    30.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 487 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    483C  LYS      3.5     5.6    +      -       -      -
    484C  GLU      2.7    10.8    +      -       -      -
    486C  LYS*     1.3    71.0    -      -       -      +
    488C  TYR*     1.3    63.9    +      -       -      +
    489C  MET      2.9     5.8    +      -       -      -
    490C  LEU*     3.8    17.2    -      -       -      +
    491C  ALA*     3.2    24.4    +      -       -      +
    494C  ARG*     4.7     2.2    +      -       -      -
    519C  ARG      4.4     1.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 488 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    484C  GLU*     3.0    46.4    +      -       +      -
    485C  HIS*     3.3    35.7    -      +       +      +
    487C  GLY*     1.3    77.5    -      -       -      +
    489C  MET*     1.3    56.3    +      -       -      +
    491C  ALA*     4.3     1.6    -      -       -      -
    492C  ALA*     3.9    17.8    +      -       -      +
    519C  ARG*     3.0    72.0    +      -       +      +
    520C  PHE*     4.4    15.8    -      +       -      -
    548C  THR      3.9     6.4    -      -       -      +
    552C  GLY*     5.1     5.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with MET 489 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    485C  HIS      3.1     9.7    +      -       -      +
    486C  LYS*     2.8    32.9    +      -       +      +
    488C  TYR*     1.3    78.5    -      -       -      +
    490C  LEU*     1.3    54.3    +      -       -      +
    491C  ALA      2.7    15.8    +      -       -      -
    492C  ALA*     3.4     8.6    +      -       -      +
    493C  GLN*     3.3    45.7    +      -       +      +
    548C  THR      5.1     0.4    -      -       -      -
    549C  GLU*     4.1    13.9    -      -       +      +
    552C  GLY*     4.1     7.4    -      -       -      -
    553C  MET*     3.4    59.5    -      -       +      +
    556C  GLN*     4.6     0.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 490 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    486C  LYS      2.5    19.2    +      -       -      +
    487C  GLY*     3.8    14.8    -      -       -      +
    489C  MET*     1.3    72.9    -      -       -      +
    491C  ALA*     1.3    50.0    +      -       -      +
    493C  GLN*     4.5     8.2    -      -       -      +
    494C  ARG*     2.6    68.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 491 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    487C  GLY      3.2    14.0    +      -       -      +
    488C  TYR      4.4     0.4    -      -       -      +
    489C  MET      2.7     1.6    +      -       -      -
    490C  LEU*     1.3    78.1    -      -       -      +
    492C  ALA*     1.3    54.9    +      -       -      +
    493C  GLN      2.4    19.4    +      -       -      -
    494C  ARG*     3.0    17.2    +      -       -      +
    495C  ASN*     3.0    26.0    +      -       -      +
    518C  TYR      3.7    14.6    -      -       -      +
    519C  ARG      4.1     9.4    -      -       -      +
    521C  ASP      3.9    19.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 492 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    488C  TYR      3.9     7.2    +      -       -      +
    489C  MET*     3.4     3.9    +      -       -      +
    491C  ALA*     1.3    74.5    -      -       -      +
    493C  GLN*     1.3    59.8    +      -       -      +
    495C  ASN*     5.1     1.3    -      -       -      -
    496C  GLY*     3.7    13.5    +      -       -      +
    518C  TYR*     3.6    13.4    +      -       +      -
    542C  LEU*     5.9     0.2    -      -       -      +
    545C  ALA*     2.9    31.0    -      -       -      +
    548C  THR*     3.1    41.5    -      -       +      +
    549C  GLU*     3.6    11.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 493 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    489C  MET*     3.3    46.9    +      -       -      +
    490C  LEU*     4.4     5.8    -      -       -      +
    491C  ALA      2.4    14.3    +      -       -      -
    492C  ALA*     1.3    66.8    -      -       -      +
    494C  ARG*     1.3    56.2    +      -       +      +
    495C  ASN      2.6    15.9    +      -       -      -
    496C  GLY*     2.7    12.8    +      -       -      -
    497C  GLU*     3.1    16.4    +      -       -      +
    549C  GLU*     3.0    35.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 494 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    487C  GLY*     4.7     2.0    +      -       -      -
    490C  LEU*     2.6    67.1    +      -       +      +
    491C  ALA*     3.0    16.9    -      -       -      +
    493C  GLN*     1.3    76.9    -      -       +      +
    495C  ASN*     1.3    86.1    +      -       -      +
    497C  GLU*     4.8     7.2    -      -       -      -
    498C  ILE*     4.8    12.3    +      -       -      +
    521C  ASP*     4.6    15.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 495 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    491C  ALA*     3.0    11.7    +      -       -      +
    492C  ALA      5.1     0.4    -      -       -      -
    493C  GLN      2.6     7.3    +      -       -      -
    494C  ARG*     1.3   105.2    -      -       -      +
    496C  GLY*     1.3    56.6    +      -       -      +
    497C  GLU      3.5     0.7    -      -       -      -
    498C  ILE*     3.0    29.8    -      -       -      +
    499C  ILE*     4.5     1.7    -      -       -      +
    520C  PHE      5.0     0.2    -      -       -      +
    521C  ASP*     2.9    28.2    -      -       -      +
    522C  PHE*     2.7    63.3    +      -       +      +
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


   I  Hydrophilic      - N and O that can donate and accept hydrogen bonds
                         (e.g., oxygen of hydroxyl group of Ser. or Thr)
  II  Acceptor         - N or O that can only accept a hydrogen bond
 III  Donor            - N that can only donate a hydrogen bond
  IV  Hydrophobic      - Cl, Br, I and all C atoms that are not in
                         aromatic rings and do not have a covalent bond to
                         a N or O atom
   V  Aromatic         - C in aromatic rings irrespective of any other 
                         bonds formed by the atom
  VI  Neutral          - C atoms that have a covalent bond to at least one
                         atom of class I or two or more atoms from class II
                         or III; atoms; S, F, P, and metal atoms in all cases
 VII  Neutral-donor    - C atoms that have a covalent bond with only one
                         atom of class III
VIII  Neutral-acceptor - C atoms that have a covalent bond with only 
                         one atom of class II
For each pair of contacts the state of legitimacy is shown below:

Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
  Atomic class           I  II  III   IV   V   VI  VII  VIII
------------------------------------------------------------
   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
------------------------------------------------------------
Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

Please E-mail any questions and/or suggestions concerning this page to Vladimir.Sobolev@weizmann.ac.il